(But when I clicked on the "Man Who Could Fly" link below the Moonwalk video, I got a "Unable to find this video" message from the Nat Geo website. Is it just not available yet? or did I just encounter a glitch?)

What a spectacular video. It says the video was shot from ~ 1 mile away at sunset.
Here's a photo showing what I think are the 2 pinnacles along the summit ridge of Cathedral Pk that the slack line is strung between. But this photo is looking NE and the pinnacles are in reverse order. Looks to me like the video was shot from the ENE of Cathedral Pk looking WSW? But if that is true, how is the moon rising in that direction?

Next time around I'm comin' back as Dean Potter. . . not for the wingsuit flying - not for the chopper rides. . . but for getting away with taking his doggie deep into Yosemite and not getting busted for it!

I was there when they filmed this video, there was no moon out that evening. The main camera was right next to me and probably 300 yards away from Dean. I suspect the moon effect has been added but I am not sure 100% how they would do that. It is also possible they went back another day and shot this video.
In any case, it was impressive to watch him go back and forth like he was floating through the air. Dean is from another planet.

FACT !! : NEEL ARMSTRONG ALREADY CONFESSED TO THIS SCAM BRAH.
YOU CAN TELL CAUSE THE AMERICAN FLAG AINT MOVIN'
AREA 51 BRAH , ONE SMALL STEP FOR DEAN , ONE GIANT STEP FOR EVRYONE ELSE !!

Regardless of how this video was made, I don't think anyone can or should question the integrity and the climbing ability of Dean Potter. Any video of him climbing deserves to be on National Geographic.

So where was the photographer located when he shot the July 12, 2011 video? I'm not trying to question the making of this video, I just want to take a full moon photo from the same location next summer.

I thought it might have been shot from the summit of Medlicott just looking at the directional relationships and that the photographer said he was ~ 1 mile away.

So here's a photo taken from the west looking east that shows the 2 pinnacles. It looks like it was taken by Lower Cathedral Lake and south of Medlicott. The "Moonwalk" photographer was probably on a ridge near near this location. Doing this in 1 take is an incredible accomplishment of coordination in space and time.

Here in CA any schmuck can get his dog registered as a service animal. Pretty lame actually, its like getting disabled placards just so you can park in front. Had to let one in with a patient into our hospital....was bullsh#t. He wasnt disabled or anything, he was just a hippie who knew how to screw around within the system.

I remember seeing the film (Facelift, I think) and Mike S. was there and answered some questions about how he got the shot. As I recall, you need the right lens and it's really long (and expensive) in order for the moon to appear so large. We probably need someone like Ed Hartouni to explain the exact ins and outs of why this happens.

Actually, he does explain (along with others) in the Half Dome visible from Turlock thread:

I talked a bit to Mike at the Facelift, great shot and great visualization for that shot.

While I have a lot less riding on my shots, I think the anxiety of getting it "right" is high all around, and once it starts to happen, you are there for the ride whether or not you got it right.

It is sublime when it is right! and the images in that short are stunning.

Basically, the Moon is effectively at an infinite distance, and has a 0.5º angular diameter...
to get a shot, you have to move the camera back so your subject, Dean's slackline in this case, has a similar angular extent. Easier to calculate this in radians rather than degrees, the Moon is 0.009 radians in diameter... if the slackline were 50' long, it would have that same angular extent as the moon if:

50'/d = 0.009

solve for d:

d=50'/0.009 = 5730' about 1.1 miles

you then setup the azimuth of the Moon at that time to give you the position, from the slackline, you have to be to get the shot... you can get the azimuth from a number of ephemera